• Phoenix hits 100 degrees for the first time in 2017

    Phoenix hits 100 degrees for the first time in 2017

  • Salt River Tubing open for 2017

    Salt River Tubing open for 2017

  • Lightning over Phoenix

    Lightning over Phoenix

  • Clouds over Phoenix

    Clouds over Phoenix

  • Dust storm hits Falcon Park in Phoenix

    Dust storm hits Falcon Park in Phoenix

Phoenix officially hit its first 100-degree day of the year on Wednesday, the National Weather Service said.

The temperature at Phoenix Sky Harbor International Airport reached 100 degrees at about 4:30 p.m.

The Weather Service predicts the next two days will see temperatures over 100, and Friday’s high could approach a record. The forecast calls for a high of 104 Friday while the record for May 5 is 105, set in 1989.

But a cooling trend will follow beginning on Sunday, with high temperatures in the Phoenix area dropping to the upper 70s or low 80s by the early part of the week, the Weather Service said.

The 100-degree heat is due to a high-pressure ridge over Arizona, according to the Weather Service.

The average date for the first annual 100-degree day in Phoenix is May 2. Last year, the 100-degree mark was reached on May 4.

READ MORE:  

6 ways to avoid heat-related illness 

Hiking in the Phoenix area? Here’s how to avoid needing to be rescued 

7 tips for keeping dogs safe in triple-digit temperatures

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